Structural and hydriding properties of amorphous MgNi with interstitially dissolved carbon

Keiji Funaki, Shin Ichi Orimo, Hironobu Fujii, Hirosuke Sumida

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

MgNiCx with an amorphous structure were synthesized up to x=1.31 by mechanical alloying of amorphous (a-)MgNi and graphite as starting materials. The core-level X-ray photoelectron spectroscopy revealed that the original bonding states with metallic character of a-MgNi remained even in the sample with high carbon content although the graphite dissolved as interstitial carbon and it mainly bounded with Mg in a-MgNi. The crystallization temperature of MgNiCx increased with increasing carbon content up to x=0.85, which was accompanied by a drastic change in the crystallization processes. Upon hydrogenation of MgNiCx, the atomic ratio of hydrogen plus carbon to metal (H+C)/M remained a constant value of ≃0.9 through the whole system, indicating that carbon atoms dissolved into the sites that otherwise would have been occupied by hydrogen atoms.

Original languageEnglish
Pages (from-to)160-163
Number of pages4
JournalJournal of Alloys and Compounds
Volume270
Issue number1-2
DOIs
Publication statusPublished - 1998 May 29
Externally publishedYes

Keywords

  • Amorphous
  • Crystallization temperature
  • Magnesium - Nickel
  • X-ray photoelectron spectroscopy

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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